Thin Films of Homopolymers and Cylinder-Forming Diblock Copolymers under Shear

Publikationstyp:
Zeitschriftenaufsatz
Metadaten:
Autoren
  • Arash Nikoubashman
  • Raleigh L Davis
  • Brian T Michal
  • Paul M Chaikin
  • Richard A Register
  • Athanassios Z Panagiotopoulos
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000340992300047&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.1021/nn502068e
eISSN
1936-086X
Externe Identifier
  • Clarivate Analytics Document Solution ID: AO0IM
  • PubMed Identifier: 25107567
ISSN
1936-0851
Ausgabe der Veröffentlichung
8
Zeitschrift
ACS NANO
Schlüsselwörter
  • thin films
  • homopolymers
  • cylinder-forming diblock copolymers
  • shear
Paginierung
8015 - 8026
Datum der Veröffentlichung
2014
Status
Published
Titel
Thin Films of Homopolymers and Cylinder-Forming Diblock Copolymers under Shear
Sub types
  • Article
Ausgabe der Zeitschrift
8

Datenquelle: Web of Science (Lite)

Andere Metadatenquellen:
Autoren
  • Arash Nikoubashman
  • Raleigh L Davis
  • Brian T Michal
  • Paul M Chaikin
  • Richard A Register
  • Athanassios Z Panagiotopoulos
DOI
10.1021/nn502068e
eISSN
1936-086X
ISSN
1936-0851
Ausgabe der Veröffentlichung
8
Zeitschrift
ACS Nano
Sprache
en
Online publication date
2014
Paginierung
8015 - 8026
Datum der Veröffentlichung
2014
Status
Published
Herausgeber
American Chemical Society (ACS)
Herausgeber URL
http://dx.doi.org/10.1021/nn502068e
Datum der Datenerfassung
2023
Titel
Thin Films of Homopolymers and Cylinder-Forming Diblock Copolymers under Shear
Ausgabe der Zeitschrift
8

Datenquelle: Crossref

Abstract
We study thin films of homopolymers (PS) and monolayers of cylinder-forming diblock copolymers (PS–PHMA) under shear. To this end, we employed both experiments and computer simulations that correctly take into account hydrodynamic interactions and chain entanglements. Excellent quantitative agreement for static as well as dynamic properties in both the homopolymer and diblock copolymer cases was achieved. In particular, we found that the homopolymer thin films exhibit a distinct shear thinning behavior, which is strongly correlated with the disentanglement and shear alignment of the constituent polymer chains. For the PS–PHMA films, we show that shear can be employed to induce long-range ordering to the spontaneously self-assembled microdomains, which is required for many applications such as the fabrication of nanowire arrays. We found that the impact of chemical incompatibility on the viscosity is only minor in shear-aligned films. Once the domains were aligned, the films exhibited an almost Newtonian response to shear because the cylindrical microdomains acted as guide rails, along which the constituent copolymer chains could simply slide. Furthermore, we developed a model for predicting the onset of shear alignment based on equilibrium dynamics data, and found good agreement with our shear simulations. The employed computational method holds promise for a faster and more cost-effective route for developing custom tailored materials.
Autoren
  • Arash Nikoubashman
  • Raleigh L Davis
  • Brian T Michal
  • Paul M Chaikin
  • Richard A Register
  • Athanassios Z Panagiotopoulos
DOI
10.1021/nn502068e
eISSN
1936-086X
Externe Identifier
  • PubMed Identifier: 25107567
Funding acknowledgements
  • Division of Materials Research: DMR-0819860
Open access
false
ISSN
1936-0851
Ausgabe der Veröffentlichung
8
Zeitschrift
ACS nano
Sprache
eng
Medium
Print
Paginierung
8015 - 8026
Datum der Veröffentlichung
2014
Status
Published
Datum der Datenerfassung
2014
Titel
Thin films of homopolymers and cylinder-forming diblock copolymers under shear.
Sub types
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.
  • Journal Article
Ausgabe der Zeitschrift
8

Datenquelle: Europe PubMed Central

Abstract
We study thin films of homopolymers (PS) and monolayers of cylinder-forming diblock copolymers (PS–PHMA) under shear. To this end, we employed both experiments and computer simulations that correctly take into account hydrodynamic interactions and chain entanglements. Excellent quantitative agreement for static as well as dynamic properties in both the homopolymer and diblock copolymer cases was achieved. In particular, we found that the homopolymer thin films exhibit a distinct shear thinning behavior, which is strongly correlated with the disentanglement and shear alignment of the constituent polymer chains. For the PS–PHMA films, we show that shear can be employed to induce long-range ordering to the spontaneously self-assembled microdomains, which is required for many applications such as the fabrication of nanowire arrays. We found that the impact of chemical incompatibility on the viscosity is only minor in shear-aligned films. Once the domains were aligned, the films exhibited an almost Newtonian response to shear because the cylindrical microdomains acted as guide rails, along which the constituent copolymer chains could simply slide. Furthermore, we developed a model for predicting the onset of shear alignment based on equilibrium dynamics data, and found good agreement with our shear simulations. The employed computational method holds promise for a faster and more cost-effective route for developing custom tailored materials.
Autoren
  • Arash Nikoubashman
  • Raleigh L Davis
  • Brian T Michal
  • Paul M Chaikin
  • Richard A Register
  • Athanassios Z Panagiotopoulos
Autoren-URL
https://www.ncbi.nlm.nih.gov/pubmed/25107567
DOI
10.1021/nn502068e
eISSN
1936-086X
Ausgabe der Veröffentlichung
8
Zeitschrift
ACS Nano
Sprache
eng
Country
United States
Paginierung
8015 - 8026
Datum der Veröffentlichung
2014
Status
Published
Datum, an dem der Datensatz öffentlich gemacht wurde
2015
Titel
Thin films of homopolymers and cylinder-forming diblock copolymers under shear.
Sub types
  • Journal Article
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.
Ausgabe der Zeitschrift
8

Datenquelle: PubMed

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